FOOD CHEMISTRY
·
2023
·
IF 8.8
Xidian Yue,Qing Hua,Wenjuan Zhang,Feiyan Tang,Xiaobing Wang,Feng Luan,Xuming Zhuang,Chunyuan Tian
In this work, europium ion-doped gadolinium trioxide nanocrystals (Gd 2 O 3 :Eu 3+ NCs) were successfully synthesized and applied to construct an electrochemiluminescence (ECL) sensor. Compared with pure Gd 2 O 3 , the doping of Eu 3+ ions caused enhanced ECL intensity and more stable signals. Based on the excellent ECL performance of Gd 2 O 3 :Eu 3+ NCs, we constructed a new ECL sensing platform for the detection of organophosphorus pesticides (OPs). The ECL sensor showed a good linear relationship in the concentration range of 1 nM to 1 pM, with a limit of detection of 0.12 pM (S/N = 3) for dichlorvos (DDVP). In addition, the constructed ECL sensor was applied for the detection of DDVP in vegetable samples, and good recoveries were obtained. The results indicated that the ECL sensor exhibited fantastic performance properties and had good application prospects in OPs detection.
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高影响因子
ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Nana Hou,Kaikai Wang,Yu Miao,Haiqian Zhang,Shuquan Chang
High-performance neutron shielding materials are essential for advanced nuclear energy technologies. However, it remains a challenge to integrate high thermal insulation and neutron shielding capabilities. In this work, mullite fiber mats with good thermal insulation properties and stability were used as the reinforcing skeleton. First, Gd2O3–Al2O3 binary aerogels were in situ synthesized on the skeleton via the sol–gel and ambient pressure drying method. Subsequently, the organic precursor derivatives in the aerogel were converted into carbon through high-temperature calcination, thereby obtaining Gd2O3–Al2O3–C ternary aerogel/mullite fiber composites. Benefiting from the effective suppression of heat transfer by the micronano pores and the high neutron absorption capability of Gd2O3, the as-prepared composites achieved high-efficiency synergistic thermal insulation and neutron shielding. At a thickness of 10 mm, the composites achieved a thermal conductivity of 0.041 W/(m·K) and a thermal neutron shielding efficiency of 88.15%. This provides a novel strategy for the design and development of multifunctional protective materials for thermal insulation and radiation shielding in the field of nuclear energy.
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高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2019
·Vol. 43
·期 13
·7614-7626
·
IF 3.343
Mangmang Shi,Yinglin Yan,Yiqi Wei,Yiming Zou,Qijiu Deng,Juan Wang,Rong Yang,Yunhua Xu,Tong Han
Summary Carbon aerogel (CA), possessing abundant pore structures and excellent electrical conductivity, have been utilized as conductive sulfur hosts for lithium-sulfur (Li-S) batteries. However, a serious shuttle effect resulted from polysulfide ions has not been effectively suppressed yet due to the weak absorption nature of CA, resulting in rapid decay of capacity as the cycle number increases. Herein, ultrafine (~3 nm) gadolinium oxide (Gd 2 O 3 ) nanoparticles (with upper redox potential of ~ 1.58 V versus Li + /Li) are uniformly in-situ integrated with CA through directly sol-gel polymerization and high-temperature carbonization. The Gd 2 O 3 modified CA composites (named as Gdx-CA, where x means molar ratio of Gd 2 O 3 nanoparticles to carbon) are incorporated with S. Then, the products (S/Gdx-CA) are acted as sulfur host materials for Li-S batteries. The results demonstrate that adding ultrafine Gd 2 O 3 nanoparticles can dramatically improve the electrochemical properties of the composite cathodes. The S/Gd2-CA electrode (loading with 58.9 wt% of S) possesses the best electrochemical properties, including a high initial capacity of 1210 mAh g −1 and a relatively high capacity of 555 mAh g −1 after 50 cycles at 0.1 C. It is noteworthy that the performance of long-term cycle (350 cycles) for the S/Gd2-CA (317 mAh g −1 after 100 cycles and 233 mAh g −1 after 350 cycles at 1 C) is improved significantly than that of S/CA (150 mAh g −1 after 150 cycles at 1 C). Overall, the enhancement of electrochemical performances can be due to the strong polar nature of the ultrafine Gd 2 O 3 nanoparticles, which provide strong adsorption sites to immobilize S and polysulfide. Furthermore, the Gd 2 O 3 nanoparticles present a catalytic effect. Our research suggests that adding Gd 2 O 3 nanoparticles into S/CA composite cathode is an effective and novelty method for improving the electrochemical performances of Li-S batteries.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米科技
·
无机非金属材料
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DOI
高影响因子
Materialia
·
2022
·
IF 0
Jianfeng Yang,Qingling Zhao,Zehao Zang,Shuquan Zhang,Ziwu Wang,Lanlan Li,Xiaofei Yu,Xiaojing Yang,Zunming Lu,Xinghua Zhang
Magnetic resonance imaging (MRI) contrast agents with high relaxivity is of great importance for clinical diagnosis. Here we propose an effective method to enhance the relaxivity of MRI contrast agents. Ultra-small gadolinium oxide nanoparticles (Gd 2 O 3 NPs) with different surface ligands were prepared by coprecipitation method, and the polyacrylic acid (PAA) modulated Gd 2 O 3 NPs (PAA-Gd 2 O 3 ) have the high r 1 relaxivity of 53.34 mM –1 s –1 , which is mainly induced by the strong affinity between PAA and water molecules. In addition, PAA modulated Gd 2 O 3 NPs were successfully loaded on Au@MSNs (Au nanorod coated with mesoporous silica , Gd 2 O 3 /Au@MSNs) with enhanced affinity between Gd 3+ and water molecules, as well as increased motional time of Gd 3+ . Therefore, the r 1 relaxivity of Gd 2 O 3 /Au@MSNs can be up to 64.53 mM –1 s –1 , which is 17 times of the commercial agent Gd-DTPA. The Gd 2 O 3 /Au@MSNs NPs also have a low r 2 /r 1 of 1.04 and good computed tomography (CT) imaging performance, as well as good biocomatibility, which have great potential applications in multimodal bioimaging.
研究领域:
医学影像学
·
纳米医学
·
生物材料学
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DOI
International Journal of Applied Ceramic Technology
·
2024
·Vol. 22
·期 1
·e14882
·
IF 1.8
Yifei Dai,Yuxuan Liao,Aoping He,Huan He,Tianquan Liang
The hot corrosion behaviors of the Sc 2 O 3 –Gd 2 O 3 –Y 2 O 3 co-doped ZrO 2 (SGYSZ) ceramics in Na 2 SO 4 + V 2 O 5 molten salts at high temperature were investigated in this work. The results show that the SGYSZ exhibits good hot corrosion resistance to the 50 wt% Na 2 SO 4 + 50 wt% V 2 O 5 molten salts at 1000°C. It is attributed to the doping of small Sc 3+ , which can decrease the M–O bonding length and increase the binding energy, and then reduce the dissolution and loss of the stabilizer as rare-earth cations Gd 3+ and Y 3+ from the SGYSZ. The significant synergistic effects of Sc 3+ , Gd 3+ , and Y 3+ are beneficial to enhance the phase stability and corrosion resistance of the zirconate ceramic due to the different ionic radius and basicity of rare-earth oxides (RE 2 O 3 ). More Gd 3+ in SGYSZ can promote the forming and coarsening of the GdVO 4 during mineralization, which can also decrease the loss of Y 3+ from the SGYSZ. The corrosion mechanism is discussed in detail.
研究领域:
材料科学
·
陶瓷
·
高温腐蚀
·
无机化学
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DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2018
·
IF 3.794
Kuo Jiang,Songbai Liu,Xin Wang
Yttria partially stabilized zirconia (∼4.0 mol% Y 2 O 3 –ZrO 2 , 4YSZ) has been widely employed as thermal barrier coatings (TBCs) to protect the high–temperature components of gas–turbine engines. The phase stability problem existing in the conventional 4YSZ has limited it to application below 1200 °C. Here we report an excellent zirconia system co–doped with 16 mol% CeO 2 and 4 mol% Gd 2 O 3 (16Ce–4Gd) presenting nontransformable feature up to 1500 °C, in which no detrimental monoclinic (m) ZrO 2 phase formed on partitioning. It also exhibits a high fracture toughness of ∼46 J m −2 and shows high sintering resistance. Besides, the thermal conductivity and thermal expansion coefficient of 16Ce–4Gd are more competent for TBCs applications as compared to the 4YSZ. The combination of properties suggests that the 16Ce–4Gd system could be of potential use as a thermal barrier coating at 1500 °C.
研究领域:
材料科学
·
工程学
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高影响因子
DALTON TRANSACTIONS
·
2022
·Vol. 51
·期 27
·10612-10622
·
IF 4.569
Yuhong Zhang,Pengcheng Wang,Haiyan Wang,Xingke Zheng,Yibin Guo,Nan Zhang,Hang Liu
Phosphors with rare earth (RE) ions are widely applied to optical temperature measurements. Moreover, the near-infrared (NIR) emission of phosphors has potential applications in the biological field. Herein, Gd2O3:x%Nd3+/Yb3+(0.2 ≤ x ≤ 0.8) samples are successfully synthesized by the sol–gel method, and their phase and morphology are characterized. The XRD data are refined by Rietveld. Under 980 nm continuous wave (CW) laser excitation, the upconversion (UC) and downshift (DS) emissions are studied. The temperature sensing performances of thermally coupled levels (TCLs) and non-thermally coupled levels (non-TCLs) of Gd2O3: Nd3+/Yb3+ phosphors are investigated through the fluorescence intensity ratio (FIR) technology. In the temperature range of 303–523 K, the maximum relative sensitivity of I761 nm/I550 nm reaches 6.54% K−1, which is based on non-TCLs. At the same time, the maximum relative sensitivity of I761 nm/I1000 nm–1500 nm reaches 3.13%. In addition, the influence of the laser induced heating (LIH) effect is studied. Compared with square wave (SW) pumping, the relative sensitivity would decrease at CW excitation. Finally, the durability and temperature uncertainty are also discussed. The results prove that the Gd2O3:Nd3+/Yb3+ samples present higher relative sensitivity and durability and lower temperature uncertainty in the biological window. Therefore, the phosphors can be used as optical thermometers in the biological field.
研究领域:
材料科学
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生物医学工程
·
光学
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高影响因子
Small
·
2023
·
IF 13.3
Mengxia Shen,Jiale Qi,Xinyu Xu,Jinbao Li,Yongjian Xu,Hao Yang,Kun Gao,Jianfeng Huang,Jiayin Li,Zhen Shang,Yonghao Ni
Multi-component composite materials with a magnetic-dielectric synergistic effect exhibit satisfactory electromagnetic wave absorption performance. However, the effective construction of the structure for these multi-component materials to fully exploit the advantages of each component remains a challenge. Inspired by natural biomass, this study utilizes wood as the raw material and successfully prepares high-performance MoS 2 @Gd 2 O 3 /Mxene loaded porous carbon aerogel (MGMCA) composite material through a one-pot hydrothermal method and carbonization treatment process. With a delicate structural design, the MGMCA is endowed with abundant heterogeneous interface structures, favorable impedance matching characteristics, and a magnetic-dielectric synergistic system, thus demonstrating multiple electromagnetic wave loss mechanisms. Benefiting from these advantages, the obtained MGMCA exhibits outstanding electromagnetic wave absorption performance, with a minimum reflection loss of −57.5 dB at an ultra-thin thickness of only 1.9 mm. This research proposes a reliable strategy for the design of multi-component composite materials, providing valuable insight for the design of biomass-based materials as electromagnetic wave absorbers.
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MOLECULAR PHARMACEUTICS
·
2019
·
IF 4.396
Yu Cheng,Tong Lu,Yidan Wang,Yilin Song,Siyu Wang,Qianglan Lu,Lifang Yang,Fengping Tan,Jiao Li,Nan Li
Recently, multifunctional clearable inorganic theranostic nanoparticles have been attracting more and more attention. Protein-based nanoparticles can be cleared by the hepatobiliary system efficiently. In this work, ultrasmall gadolinium oxide (Gd2O3) nanoparticles, which possess the advantage of high longitudinal relaxation rate, were coated with bovine serum albumin (BSA). After the Gd2O3/BSA nanoparticles were linked with two-dimensional photothermal MoS2 nanomaterials, the nanoparticles were also modified with hyaluronic acid (HA) through the disulfide bonds for tumor-targeting effect. As indicated by in vitro and in vivo studies, these Gd2O3/BSA@MoS2-HA nanoparticles could be rapidly degraded and excreted after reacting with glutathione (GSH) by the redox response, thus avoiding long-term toxicity. In addition, the cellular uptake study and in vivo multispectral optoacoustic tomography (MSOT), X-ray computed tomography (CT), and magnetic resonance (MR) triple-modal images demonstrated that Gd2O3/BSA@MoS2-HA nanoparticles exhibited a high tumor uptake effect after intravenous injection. Consequently, such clearable theranostic nanoparticles with multiple functions, which are applicable in multimodal imaging-guided cancer therapy, might show promise for applications in nanomedical science.
研究领域:
纳米医学
·
癌症治疗
·
生物医学工程
·
材料科学
·
医学成像
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高影响因子
Journal of Nanoelectronics and Optoelectronics
·
2023
·Vol. 18
·期 12
·1458-1465
·
IF 0.6
Wu Nan,Hu Kai,Fu Zhongchao,Long Haibo,Hou Zhaoxia,Shao Cen,Liang Xiao,Ibrahim Ahmed A.,Umar Ahmad
Low temperature combined with high application pressure sintering technology is one of effective approaches to fabricate ceramics with fine microstructure. We reported that the Gd2O3–MgO nanocomposite ceramics were obtained by hot-pressing sintering using
nanopowders derived from sol–gel combustion method in this paper. The high optical transmittance (80.1%–83.5%) over 2-6 μm and the high values for Vickers hardness (11.1 ± 0.3 GPa) and bending strength (192.6 ± 8.1 MPa) were obtained by hot-pressing sintering
at low sintering temperature (1300 μC) and high application pressure (65 MPa).
研究领域:
材料科学
·
光学工程
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2020
·Vol. 31
·期 12
·9321-9327
·
IF 2.22
Liu Zhen,Chen Dihu
The mixtures of Gd 2 O 3 :Yb 3+ /Er 3+ and Gd 2 O 3 :Yb 3+ /Ho 3+ nanoparticles were successfully prepared via pulsed laser ablation in liquid followed by solution mixing. Under excitation of 980 nm diode laser, tunable color from green to red emission was achieved. Based on the thermal linked energy levels, the temperature sensitive upconversion emission was observed. The fluorescence intensity ratio ( FIR ) of I 513–530 nm / I 530–580 nm increased as the elevation of temperature. The absolute sensitivity and relative sensitivity were derived from temperature dependent FIR . The results show that the mixture of Gd 2 O 3 :Yb 3+ /Er 3+ and Gd 2 O 3 :Yb 3+ /Ho 3+ nanoparticles are not only potential candidates for multicolor upconversion luminescence but also promising optical materials for non-contact optical thermometry.
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高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2019
·Vol. 411
·期 18
·4221-4229
·
IF 3.286
Long Zerong,Shen Shilin,Lu Yi,Lan Wei,Chen Jia,Qiu Hongdeng
Herein, rare-earth europium doped in Gd 2 O 3 @SiO 2 -based molecularly imprinted polymer (MIP) composite nanospheres with a multilayer core-shell structure was successfully prepared via a facile and versatile layer-by-layer assembly strategy of combination with sol-gel, hydrothermal, and surface imprinting procedure. The rare-earth Gd 2 O 3 :Eu 3+ was embedded into the inner portion of the imprinted polymer which was well-suited for fluorescent monitoring carbaryl selectively. Results showed that the recognition process of the nanosensor for carbaryl was fast and reached dynamic equilibrium at ca. 20 min. The fluorescence intensity ( F 0 / F ) is linearly related to the concentration of carbaryl [ Q ] within the range of 16–80 μg mL −1 , and the linear equation is F 0 / F = 0.8909 − 9.775 × 10 −4 [ Q ] ( R = 0.9963) with 10 μg mL −1 as the detection limit. Competition experiments showed that other analogues (methomyl, aldicarb, and isoprocarb) have nearly no interference in the detection of carbaryl. Moreover, this MIP nanosensor was successfully applied to detect carbaryl in green tea samples without pretreatment. The study afforded an efficient and desirable fluorescence sensor for carbaryl detection in a complicated matrix, which hopefully will be used for biomedical/chemical sensing recognition.
Graphical abstract
研究领域:
分析化学
·
材料科学
·
环境科学
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高影响因子
危险品化学品经营许可证（带存储）